The abundance and availability of water and nutrients in a soil ecosystem determine its fertility . 土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力。
Continually warm, moist climates generally favor the development of complex and stable ecosystems . 连续的温暖、湿润气候通常有利于发展复杂而稳定的生态系统。
The species that make up natural ecosystems usually display a wide range of genetic variability . 构成自然生态系统的生物种,通常表现有较大范围的遗传变异性。
The plants of natural ecosystems are usually well adapted to the edaphic and climatic character of their region . 自然生态系统的植物,通常十分适应当地的土壤和气候特点。
Aquatic ecosystems share a number of basic structural and functional characteristics with terrestrial ecosystems . 水生生态系统的结构和机能,在许多基本特征方面同陆地生态系统一样。
We tend to distinguish one ecosystem from another according to the most apparent features of its biological components . 我们往往根据其中特征最明显的生物成分来区分不同的生态系统。
Forest ecologists have been more concerned than agronomists with the inner mechanisms of natural and artificial ecosystems . 森林生态学家比农学家更关心天然生态系统和人工生态系统的内部机制。
Accumulation of toxic substances in the biosphere is causing serious changes in the structure and function of natural ecosystems . 生物圈内有毒物质的积累,造成了天然生态系统的结构与功能的严重变化。
Figure 1 shows an example of an sca ecosystem 图1显示了sca生态系统的一个示例。
Is the most deadly snake in the entire ecosystem 在整个生态系统中是最致命的蛇